. >> the city of san francisco was struck by an earthquake of frightening proportions. >> one of the most catastrophic earthquakes was in 1906 when thousands of people died in san francisco. today is the anniversary of the 1989 quake which brought down freeways. earthquakes are part of life here, but the scientists keyboarding the big one -- keep warning that the big one is long overdue. >> it is all about raising awareness. that was a simulation. it was very intense. it could be up to two minutes and that would cause a lot of damage. that is what people are taught to do. but a lot and a ball and protect yourself and wait for it to finish the to bundle up in a ball and protect yourself and wait for it to finish. it reminds people of the big one will come along one day and they should be ready. >> the importance of being trained to take cover. that brings today's program to close. you confine constant updates on our website. you can reach most of the team, go to twitter. thank you for watching. >> make sense of international news at bbc.com/news. >> funding for this presentation was m